338 



CYPERACEAE 



149. Carex suborbiculata Mackenzie, n. sp. 

 Round-fruited Mountain Sedge. Fig. 825. 



Densely cespitose ; the culms erect, stiff but slender, 3-4.5 

 dm. high', sharply triangular and slightly roughened above, 

 strongly aphyllopodic, reddish-tinged at base. Leaves 2-4 to a 

 culm, the blades 1.25-2 mm. wide, with revolute margms, long 

 attenuate, the lower sheaths tilamentose; terminal spike staminate 

 or pistillate below, short-peduncled, 1.5 cm. long, the scales 

 oblong, very obtuse, purplish Ijlack with conspicuous light 

 colored midrib; pistillate spikes 3 or 4, erect, linear. 1-2.5 cm. 

 long, 3-4 mm. wide, the upper sessile and aggregated, the lower 

 peduncled and separate, closely flowered with 15-40 spreading 

 perigynia; lowest bract from much shorter than to equalling in- 

 florescence, not dark-auricled; scales oblong, very obtuse, much 

 narrower and shorter than the perigynia, purplish black with 

 conspicuous light-colored midrib; perigynia biconvex and in age 

 turgid, suborbicular to broadly obovoid-oval in cross-section, 

 2.5 ''mm. long, 1.5-1.75 mm. wide, whitish, purplish blotched, 

 membranaceous, puncticulate, rather strongly several-nerved, 

 substipitate, rounded at base, abruptly minutely beaked, the beak 

 entire straight or somewhat bent; achenes lenticular; style 

 slender, jointed with the achenes; stigmas 2. 



Klickitat and Skamania Counties, Washington.^ Type: along mountain 

 streams, Klickitat County, Washington (Siiksdorf 1315). 



150. Carex eurycarpa Holm. 

 Well-fruited Sedge. Fig. 826. 



Carex eurycarpa Holm, Am. Journ. .Sci. IV. 20: 303. 1905. 



Loosely cespitose and long stoloniferous from creeping 

 rootstocks, the culms aphyllopodic, 4-9 dm. high, slender, 

 sharply triangular, roughened above. Leaves several to 

 a culm, the blades flat with revolute margins. 3-4.5 mm. 

 wide, roughened towards apex, the lower sheaths minutely 

 hispidulous and rounded dorsally, olive tinged and spar- 

 ingly filamentose ventrally; staminate spike niore or less 

 peduncled, usually 3-4 cm. long; lateral spikes 3-5, the 

 upper often staminate above, sessile or short-peduncled, 2-4 

 cm. long, 4-6 mm. wide, the numerous perigynia ap- 

 pressed; lowest bract usually exceeding the culm ; scales 

 lanceolate, short acuminate, purplish brown with prominent 

 light midvein ; perigynia sulDorbicular or broadly obovate, 

 2.75 mm. long, 2 mm. wide, several nerved on both faces, 

 puncticulate, minutely roughened, greenish or straw- 

 colored, rounded and substipitate at base, and rounded and 

 abruptly minutely beaked at orifice, the beak 0.5 mm. long, 

 emarginate ; achenes lenticular; style slender; stigmas 2. 



In boggy meadows. Transition Zone; Washington to northern 

 California and extending south in the Sierra Nevada to El Dorado 

 County. Type locality: Falcon Valley, Klickitat County, Washing- 

 ton. 



151. Carex oxycarpa Fiulm. 

 Sharp- fruited Sedge. Fig. 827. 



Carex oxycarpa Holm, Am. Journ. Sci. IV. 20: 303. 1905. 



Carex eurycarpa oxvcarpa Kiikenth. in Engler Pflanzenreich 4-'_: 339. 1909. 



Carex egregia Mackenzie, Bull. Torrey Club 42: 414. 1915. 



Looselv cespitose and stoloniferous from creeping root- 

 stocks, the culms aphyllopodic, 4.5-9 dm. high, sknder, sharply 

 triangular, slightly roughened above. Leaves 3-4 to a culm, 

 the blades flat with revolute margins, 2-3 mm. wide, roughened 

 towards apex, the lower sheaths hispidulous and scarcely 

 carinate dorsallv and light brownish ventrally; terminal spike 

 staminate, stalked ; lateral spikes 4-5, the upper 1-2 staminate, 

 the lower 2-4 pistillate or androgynous, sessile or short-pe- 

 duncled, 2.5-4.5 cm. long, 5 mm. wide, the perigynia numer- 

 ous, appressed-ascending; lowest bract exceeding inflores- 

 cence ; scales lanceolate, acute, purplish black with lighter mid- 

 vein ; perigvnia oblanceolate or narrowly obovate, 3.5 mm. 

 long", 1.5 mm. wide, 3-5 striate on both faces, granular rough- 

 ened', brownish, rounded and substipitate at base and rounded 

 and abruptly minutely apiculate at apex, the orifice entire ; 

 achenes lenticular; style slender; stigmas 2. 



Wet meadows. Transition Zone: from northern California tn Wash- 

 ington and east to Idaho. Probably a form of Carex eurycarpa Holm 

 Type locality: west Klickitat County, Washington. 



